Failure Criterion For Soils Research Articles

Back-calculating strength parameters and predicting displacements of deep-seated sliding surface comprising weathered rocks

A cost- and time-effective procedure for back-calculating the strength and deformation properties of natural slopes consisting of highly weathered or jointed rocks is of high practical importance. A novel procedure is proposed which incorporates a limit-equilibrium-based slice method to derive strength parameters for soils and weathered rocks and a force-equilibrium-based finite displacement method (FFDM) to derive the displacement-related material parameters for a deep-seated sliding mass. Various failure criteria for soils and rocks are used in back-calculating the strength parameters for a studied slope. First, the displacement-related parameters are back-calculated based on the measured slope displacement triggered by an intensive rainfall. These back-calculated strength and displacement parameters are then used to predict slope displacements induced by subsequent events of rainfall. The effectiveness of the proposed procedure is verified based on the case history of a natural slope subjected to periodic rainfall-induced slope movements.

Upper Bound Limit Analysis of Soil with Non-Linear Failure Criterion

The paper discusses the effects of non-linearity in the failure criterion of soil on the upper hound solution procedure. By considering the inherent non-linearity of the failure criterion, it is demonstrated that the upper bound procedure yields not only the minimum value of and the external load and the failure mechanism, but also the stress distribution along the slip surface. The stress distribution so obtained satisfies a Kotter type differential equation and guaranties the global equilibrium of the sliding mass. This result is valid for both linear and non-linear failure criteria. When the failure criterion is linear, it is demonstrated that for a simple failure mechanism the classical solution procedure provides only a partial solution which does not include the normal stress distribution. This is due to the different consequence of the normality requirement in the linear and non-linear cases.

The failure criteria for soils : Technical note. 2F, 2T, 8R. CAN. GEOTECH. j. V11, N4, NOV. 1974, P628–632

The failure criteria for soils : Technical note. 2F, 2T, 8R. CAN. GEOTECH. j. V11, N4, NOV. 1974, P628–632